As far as finish...
The old Colnago Super bikes have only a chrome fork crown. Mine came with over the bottom bracket cable guides, and a single derailleur cable stop. Everything else was clamp on.
By that time, other brands had chrome head tube lugs, chrome dropouts, perhaps a chrome chainstay.
Dad's old Torpado appeared to be painted over a fully chromed frame.
Some companies were using internal cable routing quite early.
The Supers were markedly plain.
At some point Colnago did introduce the Superissimo that got the chrome head tube lugs. But they also stopped painting forks.
The Colnago Chrome work may leave a bit to be desired. My old Colnago Super has had fork crown rust spots for as long as I can remember.
For a pure race bike, perhaps one doesn't need all the foofoo stuff.
It wasn't until a little later when Colnago started experimenting with shaped tubes, and unique paint jobs that they really came into their own.
Anyway, there may be other similar era bikes that have far nicer finish.